arse over tip vs ass over teakettle

arse over tip

adv

  • Tumbling or falling; upside-down. 

ass over teakettle

adv

  • Tumbling upside down. 

  • Frantically. 

adj

  • In complete disarray. 

How often have the words arse over tip and ass over teakettle occurred in a corpus of books? (source: Google Ngram Viewer )